Reading temperature from the spectrometer temperature sensor

spectrometer and system information

model: STS UV spectrometer S11908
operating system: Debian 9
python version: 3.5
python-seabreeze version: 0.6.0
installed-via: python setup.py install

current problem

I would like to read the temperature of the ambient via the spectrometer temperature sensor. But it results in the following error:

seabreeze.cseabreeze.wrapper.SeaBreezeError: b'Error: No such feature on device'

steps to reproduce

import seabreeze.spectrometers as sb
spec=sb.Spectrometer.from_serial_number()
spec.tec_get_temperature_C()

minimal code example and error (very helpful if available)

>>> import seabreeze.spectrometers as sb
>>> spec=sb.Spectrometer.from_serial_number()
>>> spec
<Spectrometer STS:S11908>
>>> spec.tec_get_temperature_C()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.5/dist-packages/seabreeze/spectrometers.py", line 227, in tec_get_temperature_C
    return lib.tec_read_temperature_degrees_C(self._dev, self._fidte)
  File "seabreeze/cseabreeze/wrapper.pyx", line 509, in seabreeze.cseabreeze.wrapper.tec_read_temperature_degrees_C (./seabreeze/cseabreeze/wrapper.c:12153)
seabreeze.cseabreeze.wrapper.SeaBreezeError: b'Error: No such feature on device'

Hi @RadhaKrishnanme,

the STS does not support the tec feature.
If you update to the newest version of python-seabreeze, you can measure the temperature of your STS as described here:

https://github.com/ap--/python-seabreeze/issues/37#issuecomment-530538238

Let me know if it works or if I can help you, and please close this issue if the instructions above resolve your issue 😊

Cheers,
Andreas

Hi Andreas,
I installed python-seabreeze 1.0.1 as per the instructions and executed the commands as mentioned in issue #37. I received error while reading all the temperatures. But reading the individual temperature was fine. Attached is the code for your reference.

>>> from seabreeze.spectrometers import Spectrometer
>>> spec = Spectrometer.from_first_available()
>>> print(spec)
<Spectrometer STS:S12090>
>>> spec.f.temperature.temperature_get_all()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "src/seabreeze/cseabreeze/c_seabreeze_wrapper.pyx", line 2875, in seabreeze.cseabreeze._wrapper.SeaBreezeTemperatureFeature.temperature_get_all
TypeError: 'int' object is not iterable

>>> a = spec.f.temperature.read_temperature(0)
>>> print (a)
39
>>> a = spec.f.temperature.read_temperature(1)
>>> print (a)
-32
>>> a = spec.f.temperature.read_temperature(2)
>>> print (a)
65

Interesting!
you found two bugs 😄

this needs to cast to float

python-seabreeze/src/seabreeze/cseabreeze/c_seabreeze_wrapper.pyx

Line 2848 in 5adee55

return int(output)

this needs to return the list of temperatures

python-seabreeze/src/seabreeze/cseabreeze/c_seabreeze_wrapper.pyx

Line 2875 in 5adee55

return tuple(output)

I'll push a fix and release a new version soon 👍

Thanks for the detailed bug reports 🎉 🏅

Cheers,
Andreas

Thanks for the info. Do you want me to close this issue?